pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-16370-1131_Mary_Gray.ps) >>/Users/jc/w/tmp/Tune-16370-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/1131_Mary_Gray.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_16370.log 1203200 Log file, useful mostly for debugging
Tune-16370-1131_Mary_Gray.abc 792 ABC music file with the extracted tune(s)
Tune-16370-1131_Mary_Gray.ps 36229 PostScript
Tune-16370-1131_Mary_Gray.txt 792 Plain-text file with the extracted tune(s)
Tune-16370-get.log 4490 Log file, useful mostly for debugging
These files should be available for 24 hours.